Pediatric dentistry
Chalky teeth (MIH) in children
Molar incisor hypomineralisation, or MIH, is a disturbance in how enamel forms. Affected teeth look patchy, are softer than healthy enamel and are often sensitive.
How parents recognise it
The typical sign is sharply outlined patches on individual teeth — white, cream or yellowish-brown. It usually affects the first permanent molars, sometimes the permanent front teeth as well.
Other things parents often notice:
- Your child flinches while brushing or avoids certain spots.
- Cold or hot food hurts in one specific place even though there is no visible hole.
- Material crumbles away from the chewing surface even though the tooth has only just come through.
One important distinction: chalky teeth are not cavities, and they are not caused by poor brushing. The exact cause is still not fully established.
Why affected teeth are so sensitive
In the affected areas the enamel contains too little mineral. It is more porous and more permeable, so stimuli reach the nerve faster. The rough surface also gives bacteria more to hold on to, which explains the higher decay risk.
That has two practical consequences: affected teeth need more protection, and local anaesthetic sometimes works less reliably on them. Both should be planned for from the start.
Treatment by severity
Not every chalky tooth needs the same treatment. The usual approach works up in stages.
- 1
Monitor and protect
Mild forms with no loss of structure are documented and reviewed closely.
- 2
Intensive fluoride
Varnish applied regularly makes the surface more resistant and can reduce sensitivity.
- 3
Cover sensitive areas
Exposed porous areas can be sealed or covered with a filling.
- 4
Restore stably
Where a lot of structure is missing, a crown protects the tooth better in the long run than a large filling.
- 5
Plan long term
In severe cases the long-term options are thought through together with an orthodontist.
What helps at home
A soft brush and a toothpaste suited to your child's age make brushing more bearable. If your child avoids certain spots, that is usually pain avoidance rather than defiance.
Do tell us if brushing has become a daily battle — small adjustments often make a real difference. There is more in our guide What are chalky teeth?.
Common questions about chalky teeth
Is this my fault?
No. MIH develops while the enamel is forming, long before the tooth becomes visible. It has nothing to do with day-to-day tooth brushing.
Will the patches grow out?
The altered enamel stays as it is. What can be influenced is what happens next: protection, sensitivity, and preventing additional decay.
Can baby teeth be affected too?
Similar changes can occur on baby molars. Spotting that early is a reason to watch the permanent teeth that come through later particularly closely.
Related treatments
Fluoride treatment
Fluoride varnish makes enamel more resistant. How often it is worth applying depends on cavity risk.
Learn more
Pediatric crowns
When a filling has nothing left to hold on to, a preformed crown protects the tooth until it is replaced.
Learn more
Prevention & cavity care
Regular check-ups, cleaning and age-appropriate coaching, so that cavities have as little chance as possible to start.
Learn more
Spotted patches on the new molars?
Having them looked at early keeps more options open for protecting the tooth.